WHAT'S IT ABOUT? Topics typically combine a citizen-driven need with a scientific or technological challenge. Examples range from tracking your trash, studying the bacteria in your wallet, building social networks for cyclists or preparing for the next hurricane. Read more about these and other projects that will be pitched at the hackfest here.

HOW CAN I HELP? Pitch your own project, or join a team. Come for a few hours, a whole day or the entire weekend. Although many projects are about science and software, you don't have to be a programmer or a scientist to help : experience in graphic design, marketing, journalism and electronics is always useful. Come to contribute, come to learn!